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You searched for: subject:"ray-tracing"
[texts]Simplified method of tracing rays through any optical system of lenses, prisms, and mirrors - Silberstein, Ludwik, b. 1872

Keywords: Optics, Geometrical; [Ray tracing]; Refraction
Downloads: 761
[texts]Image evaluation of the high resolution VUV spectrometer at SURF II by ray tracing (Volume 103) - Das, NC
Journal of Research of the National Institute of Standards and Technology
Keywords: ray tracing; high resolution; off-plane Eagle
Downloads: 82
[texts]A study of underwater sound ray tracing methodology - Read, Robert R.
Cover title
Keywords: ACOUSTIC TRACKING; RAY TRACING; UNDERWATER TRACKING
Downloads: 42
[texts]Central Radio Propagation Laboratory exponential reference atmosphere (Volume 63D) - Bean, B.R.
Journal of Research of the National Bureau of Standards
Keywords: CRPL Exponential Reference Atmosphere; refraction variable; ray; ray-tracing theory
Downloads: 48
[texts]Lens Aberration Data - J.M. Palmer
J.M. Palmer Lens Aberration Data Adam Hilger 1971 Acrobat 7 Pdf 19.2 Mb. Scanned by artmisa using Canon DR2580C + flatbed option
Keywords: Physics; Optics; Geometrical Optics; Ray Tracing; Rayleigh; Strehl; OTF
Downloads: 218
[texts]Effect of atmospheric horizontal inhomogeneity upon ray tracing (Volume 63D) - Bean, B.R.
Journal of Research of the National Bureau of Standards
Keywords: atmospheric horizontal inhomogeneity; ray tracing; refractive index; atmosphere; elevation angle; value of bending; bending
Downloads: 45
[movies]MIT 2.71 Optics, Spring 2009
Instructors: George Barbastathis, Colin Sheppard, Se Baek Oh This course provides an introduction to optical science with elementary engineering applications. Topics covered in geometrical optics include: ray-tracing, aberrations, lens design, apertures and stops, radiometry and photometry. Topics covered in wave optics include: basic electrodynamics, polarization, interference, wave-guiding, Fresnel and Fraunhofer diffraction, image formation, resolution, space-bandwidth product...
Keywords: optical science; elementary engineering applications; Geometrical optics; ray-tracing; aberrations; lens design
Downloads: 17,850
[texts]Strip Yield Model Numerical Application to Different Geometries and Loading Conditions - Hatamleh, Omar
A new numerical method based on the strip-yield analysis approach was developed for calculating the Crack Tip Opening Displacement (CTOD). This approach can be applied for different crack configurations having infinite and finite geometries, and arbitrary applied loading conditions. The new technique adapts the boundary element / dislocation density method to obtain crack-face opening displacements at any point on a crack, and succeeds by obtaining requisite values as a series of definite integr...
Keywords: CONTOURS; TEMPERATURE EFFECTS; WIND EFFECTS; GROUND EFFECT (AERODYNAMICS); ACOUSTICS; PROPAGATION; RAY TRACING; SOUND PRESSURE; TEMPERATURE PROFILES
Downloads: 74
[texts]Comparison of two methods for estimating sound intensity - NON
Linearized, and nonlinear ray tracing methods for estimating atmospheric noise field intensities from aerological observations
Keywords: AEROLOGY; ATMOSPHERICS; RAY TRACING; SOUND INTENSITY; COMPUTER PROGRAMS; ESTIMATING; METEOROLOGY; OPTICAL MEASUREMENT; STATISTICAL ANALYSIS
Downloads: 525
[texts]Measuring the Internal Structure and Physical Conditions in Star and Planet Forming Clouds Core: Toward a Quantitative Description of Cloud Evolution - Lada, Charles J
This grant funds a research program to use infrared extinction measurements to probe the detailed structure of dark molecular cloud cores and investigate the physical conditions which give rise to star and planet formation. The goals of this program are to acquire, reduce and analyze deep infrared and molecular-line observations of a carefully selected sample of nearby dark clouds in order to internal structure of starless cloud cores and to quantitatively investigate the evolution of such struc...
Keywords: JP-8 JET FUEL; FIRES; RADIATIVE TRANSFER; COMBUSTION PHYSICS; GRAY GAS; MONTE CARLO METHOD; RAY TRACING; QUADRATURES; METHOD OF MOMENTS
Downloads: 60
[texts]Refrigeration for Cryogenic Sensors - NON
Research in cryogenically cooled refrigerators is discussed. Low-power Stirling cryocoolers; spacecraft-borne long-life units; heat exchangers; performance tests; split-stirling, linear-resonant, cryogenic refrigerators; and computer models are among the topics discussed.
Keywords: CASSEGRAIN ANTENNAS; SUBROUTINES; ERROR FUNCTIONS; MATHEMATICAL MODELS; WAVE FRONT DEFORMATION; CARTESIAN COORDINATES; COMPUTER PROGRAMMING; PARABOLIC REFLECTORS; RAY TRACING; SUBREFLECTORS
Downloads: 311
[texts]Analytical and Experimental Characterization of a Linear-Array Thermopile Scanning Radiometer for Geo-Synchronous Earth Radiation Budget Applications - Sorensen, Ira J
The Thermal Radiation Group, a laboratory in the department of Mechanical Engineering at Virginia Polytechnic Institute and State University, is currently working towards the development of a new technology for cavity-based radiometers. The radiometer consists of a 256-element linear-array thermopile detector mounted on the wall of a mirrored wedgeshaped cavity. The objective of this research is to provide analytical and experimental characterization of the proposed radiometer...
Keywords: LASER PROPULSION; UNSTRUCTURED GRIDS (MATHEMATICS); RAY TRACING; PLASMA RADIATION; SPARK IGNITION; MATHEMATICAL MODELS; ALUMINUM; AEROTHERMODYNAMICS; BREMSSTRAHLUNG; FREE ELECTRONS; METAL SURFACES; PROPULSION SYSTEM CONFIGURATIONS; ABLATION; IONIZATION
Downloads: 87
[texts]Nitrogen and carbon cycling along the Oregon transect - NON
As part of the large, multidisciplinary OTTER project, data on several soil and vegetation variables were collected. Efforts focused mainly on N cycling, especially at the Scio (site 3) location, one of the more intensively studied sites. This report briefly summarizes efforts to provide 'ground truth' support for the modeling and remote sensing tasks of OTTER.
Keywords: APPLICATIONS PROGRAMS (COMPUTERS); RAY TRACING; SCIENTIFIC VISUALIZATION; CURVE FITTING; DATA SMOOTHING; FINITE ELEMENT METHOD; SPLINE FUNCTIONS; SURFACE DISTORTION; ALGORITHMS; CUBIC EQUATIONS; GRAPHICAL USER INTERFACE
Downloads: 43
[texts]Braided Carbon Fiber Rope Flow Characteristics - Heman, J. R. C
I am submitting the following technical subject for consideration as a thesis topic for the master degree: The reusable solid rocket motor (RSRM) nozzle internal joints are being evaluated for the incorporation of a carbon fiber rope (CFR) as a thermal barrier. The CFR is approximately 0.260 in. diameter and is composed of approximately 12,000 carbon fibers, woven in ten sheaths or layers. The CFR is manufactured by a sub-tier vendor and subsequently several of its manufacturing details are prop...
Keywords: FINITE DIFFERENCE TIME DOMAIN METHOD; REFRACTED WAVES; FRESNEL DIFFRACTION; ELECTROMAGNETIC SCATTERING; ASYMPTOTIC SERIES; ASYMPTOTIC PROPERTIES; ASYMPTOTIC METHODS; OPTICAL PROPERTIES; ALBEDO; GEOMETRICAL OPTICS; RAY TRACING
Downloads: 82
[texts]Theory of the Lattice Boltzmann Method: Lattice Boltzmann Models for Non-ideal Gases - Luo, Li-Sh
In this paper a procedure for systematic a priori derivation of the lattice Boltzmann models for non-ideal gases from the Enskog equation (the modified Boltzmann equation for dense gases) is presented. This treatment provides a unified theory of lattice Boltzmann models for non-ideal gases. The lattice Boltzmann equation is systematically obtained by discretizing the Enskog equation in phase space and time...
Keywords: PLASMA PHYSICS; NONEQUILIBRIUM RADIATION; RADIATIVE HEAT TRANSFER; GAS LASERS; PLASMA RADIATION; RADIATION ABSORPTION; RADIATION EFFECTS; LASER BEAMS; RAY TRACING; BEER LAW
Downloads: 166
[texts]The Singularity Mystery Associated with a Radially Continuous Maxwell Viscoelastic Structure - Fang, Ming
The singularity problem associated with a radially continuous Maxwell viscoclastic structure is investigated. A special tool called the isolation function is developed. Results calculated using the isolation function show that the discrete model assumption is no longer valid when the viscoelastic parameter becomes a continuous function of radius. Continuous variations in the upper mantle viscoelastic parameter are especially powerful in destroying the mode-like structures...
Keywords: RADIO WAVES; IO; DIRECTION FINDING; JUPITER (PLANET); PLASMA WAVES; ULYSSES MISSION; RADIO EMISSION; RAY TRACING; PLANETARY MAGNETIC FIELDS; CIRCULAR POLARIZATION; REFRACTION; TORUSES
Downloads: 66
[texts]Constitutive Modeling of Crosslinked Nanotube Materials - Odegard, G. M.
A non-linear, continuum-based constitutive model is developed for carbon nanotube materials in which bundles of aligned carbon nanotubes have varying amounts of crosslinks between the nanotubes. The model accounts for the non-linear elastic constitutive behavior of the material in terms of strain, and is developed using a thermodynamic energy approach. The model is used to examine the effect of the crosslinking on the overall mechanical properties of variations of the crosslinked carbon nanotube...
Keywords: ASTROPHYSICS; MIRRORS; X RAY SCATTERING; POWER SPECTRA; SUNYAEV-ZELDOVICH EFFECT; X RAY ASTROPHYSICS FACILITY; ASTRONOMICAL OBSERVATORIES; COSMOLOGY; GALACTIC EVOLUTION; CALIBRATING; LINE SPECTRA; RAY TRACING; DATA REDUCTION
Downloads: 74
[texts]Video photographic considerations for measuring the proximity of a probe aircraft with a smoke seeded trailing vortex - Childers, Brooks A.
Considerations for acquiring and analyzing 30 Hz video frames from charge coupled device (CCD) cameras mounted in the wing tips of a Beech T-34 aircraft are described. Particular attention is given to the characterization and correction of optical distortions inherent in the data.
Keywords: LASER PUMPING; PLANE WAVES; RAY TRACING; TEMPERATURE GRADIENTS; TEMPERATURE PROFILES; TIME DEPENDENCE; LENSES; MATHEMATICAL MODELS; REFRACTIVITY; RODS; SOLID STATE LASERS; COOLING; CRYSTALS; PHASE SHIFT
Downloads: 74
[texts]Crustal dynamics project data analysis, 1991: VLBI geodetic results, 1979 - 1990 - Ma, C.
The Goddard VLBI group reports the results of analyzing 1412 Mark II data sets acquired from fixed and mobile observing sites through the end of 1990 and available to the Crustal Dynamics Project. Three large solutions were used to obtain Earth rotation parameters, nutation offsets, global source positions, site velocities, and baseline evolution. Site positions are tabulated on a yearly basis from 1979 through 1992...
Keywords: ALGORITHMS; POSITION (LOCATION); SPACECRAFT COMPONENTS; STRUCTURAL WEIGHT; IONIZING RADIATION; LONG DURATION EXPOSURE FACILITY; RADIATION SHIELDING; RADIATION TRANSPORT; RAY TRACING; THREE DIMENSIONAL MODELS; DOSIMETERS; GEOMETRY
Downloads: 140
[texts]A design and implementation methodology for diagnostic systems - Williams, Linda J. F
A methodology for design and implementation of diagnostic systems is presented. Also discussed are the advantages of embedding a diagnostic system in a host system environment. The methodology utilizes an architecture for diagnostic system development that is hierarchical and makes use of object-oriented representation techniques. Additionally, qualitative models are used to describe the host system components and their behavior...
Keywords: COMPUTER AIDED DESIGN; RAY TRACING; REACTION KINETICS; THERMODYNAMIC EQUILIBRIUM; TRANSONIC FLOW; HYDROGEN PLASMA; LASER APPLICATIONS; LASER PROPULSION; NAVIER-STOKES EQUATION; PLASMA PROPULSION; FINITE DIFFERENCE THEORY; FORCED CONVECTION; PRESSURE EFFECTS
Downloads: 56
[audio]MIT2.71F04 - MIT OpenCourseWare
This course is an introduction to optical science with elementary engineering applications. Topics covered include geometrical optics: ray-tracing, aberrations, lens design, apertures and stops, radiometry and photometry; wave optics: basic electrodynamics, polarization, interference, wave-guiding, Fresnel and Faunhofer diffraction, image formation, resolution, and space-bandwidth product. Emphasis is on analytical and numerical tools used in optical design...
Keywords: optical science; elementary engineering applications; Geometrical optics; ray-tracing; aberrations; lens design; apertures; stops; radiometry; photometry; Wave optics; basic electrodynamics; polarization; interference; wave-guiding; Fresnel; Faunhofer diffraction; image formation; resolution; space-bandwidth product; optical design
Downloads: 159
[texts]Evaluation of boundary conditions for computational aeroacoustics - Hixon, R.
The performance of three boundary conditions for aeroacoustics were investigated, namely, (1) Giles-1990; (2) Tam and Webb-1993, and (3) Thompson-1987. For each boundary condition, various implementations were tested to study the sensitivity of their performance to the implementation procedure. Details of all implementations are given. Results are shown for the acoustic field of a monopole in a uniform freestream.
Keywords: CONTAMINATION; BREADBOARD MODELS; CHANNEL MULTIPLIERS; ENVIRONMENTAL MONITORING; MAGNETOSPHERES; MICROCHANNEL PLATES; RAY TRACING; SENSITIVITY; SPACE STATIONS; TEMPERATURE DISTRIBUTION; DESIGN ANALYSIS; FLUX (RATE); HIGH VOLTAGES; MASS DISTRIBUTION; OUTGASSING; PHOTOMULTIPLIER TUBES; SPACE PLASMAS; TIME OF FLIGHT SPECTROMETERS
Downloads: 91
[texts]Assessment, development and application of combustor aerothermal models - Holdeman, J. D.
The gas turbine combustion system design and development effort is an engineering exercise to obtain an acceptable solution to the conflicting design trade-offs between combustion efficiency, gaseous emissions, smoke, ignition, restart, lean blowout, burner exit temperature quality, structural durability, and life cycle cost. For many years, these combustor design trade-offs have been carried out with the help of fundamental reasoning and extensive component and bench testing, backed by empirica...
Keywords: ANTENNA DESIGN; PROJECT SETI; RAY TRACING; TRACKING (POSITION); VERY LARGE ARRAY (VLA); VERY LONG BASE INTERFEROMETRY; CODING; CONTROLLERS; DEEP SPACE NETWORK; RANGEFINDING; SIGNAL DETECTION; SPACECRAFT COMMUNICATION; ALGORITHMS; NOISE TEMPERATURE
Downloads: 75
[texts]NASA-GIT Predoctoral Design Training Program - Dickerson, Steve L.
This progress report contains the Georgia Institute of Technology's graduate school NASA Design Traineeship Program's evaluation and status for the Aug. 31, 1970 to Aug. 31, 1971 physical year. The two projects, Solid Waste Collection and Disposal and Water Pollution Control, are discussed, the trainee status' are listed along with their semester course loads, and the upcoming 1972 project is presented.
Keywords: RAY TRACING; DAYTIME; REFRACTIVITY; POWER SPECTRA; HIGH ALTITUDE; GYROFREQUENCY; RESONANT FREQUENCIES; CONCENTRATION (COMPOSITION); MCMURDO SOUND; MAGNETOHYDRODYNAMIC WAVES; MAGNETOPAUSE; PLASMA COMPOSITION; FILTRATION; WAVE PROPAGATION; ATMOSPHERIC EFFECTS; HEAVY IONS; OXYGEN IONS
Downloads: 82
[texts]Suckdown, fountain lift, and pressures induced on several tandem jet V/STOL configurations - Bellavia, David C.
As part of a program to improve the methods for predicting the suckdown and hot gas ingestion for jet V/STOL aircraft in ground effect, a data base is being created that provides a systematic variation of parameters so that a new empirical prediction procedure can be developed. The first series of tests in this program was completed. Suckdown, fountain lift, and pressures induced on several two-jet V/STOL configurations are described...
Keywords: AIR TRAFFIC CONTROL; TAKEOFF; AIRPORTS; ANTENNA ARRAYS; ELECTROMAGNETIC FIELDS; ESTIMATING; RAY TRACING; TERRAIN; APPROACH; FLEXIBILITY; FLIGHT PATHS; INSTRUMENT LANDING SYSTEMS; MICROWAVE LANDING SYSTEMS; MULTIPATH TRANSMISSION; REAL TIME OPERATION; SCATTERING
Downloads: 74
[texts]Structural Performance of a Compressively Loaded Foam-Core Hat-Stiffened Textile Composite Panel - Ambur, Damodar R.
A structurally efficient hat-stiffened panel concept that utilizes a structural foam as a stiffener core material has been designed and developed for aircraft primary structural applications. This stiffener concept is fabricated from textile composite material forms with a resin transfer molding process. This foam-filled hat-stiffener concept is structurally more efficient than most other prismatically stiffened panel configurations in a load range that is typical for both fuselage and wing stru...
Keywords: MAGNETOMETERS; SPACEBORNE EXPERIMENTS; SPACE LABORATORIES; MAGNETIC SIGNATURES; POLARIZATION (WAVES); OPTICAL MEASUREMENT; RAY TRACING; FUNCTIONAL DESIGN SPECIFICATIONS; MAGNIFICATION; MAGNETIC LENSES; COLLIMATORS; DESIGN ANALYSIS; SOLAR INSTRUMENTS; SOLAR PHYSICS; SPACEBORNE ASTRONOMY; ASTRONOMICAL POLARIMETRY; CASSEGRAIN OPTICS; OPTICAL MEASURING INSTRUMENTS; SPACEBORNE TELESCOPES
Downloads: 148
[texts]The Restless Atom and The Expanding Universe - Patrick Bruskiewich
A talk given in 2011 that begins with Euclid's Optiks, and continues on to Leonardo and ray tracing, and Johannes Kepler's thin lens equation, to Newton the solar spectrum and his Optiks,light and photons, Richard Feynman and Quantumelectrodynamics, Canadian physicist and Nobel Physics Prize winner Arthur Schawlow and the Laser, Canadian Astronomer Andrew McKellar, The Big Bang, the Cosmic Background Radiation and Gamma Ray Bursts...
Keywords: Euclid's Optiks; Leonardo da Vinci; ray tracing; Kepler's thin lens equation; Newton and spectrum; Feynman QED; Schawlow laser; Andrew McKellar; Big Bang; Cosmic Background Radiation; Gamma Ray Bursts, Pythagoras Publishing
Downloads: 1,076
[texts]Chandra Observations and Models of the Mixed Morphology Supernova Remnant W44: Global Trends - Shelton, R. L.
We report on the Chandra observations of the archetypical mixed morphology (or thermal composite) supernova remnant, W44. As with other mixed morphology remnants, W44's projected center is bright in thermal X-rays. It has an obvious radio shell, but no discernable X-ray shell. In addition, X-ray bright knots dot W44's image. The spectral analysis of the Chandra data show that the remnant s hot, bright projected center is metal-rich and that the bright knots are regions of comparatively elevated ...
Keywords: MATHEMATICAL MODELS; RAY TRACING; ROOT-MEAN-SQUARE ERRORS; WAVE FRONT DEFORMATION; THERMOELASTICITY; SENSITIVITY ANALYSIS; JAMES WEBB SPACE TELESCOPE; THERMAL ANALYSIS; STRUCTURAL ANALYSIS; OPTICAL MEASUREMENT; FINITE ELEMENT METHOD; TEMPERATURE DEPENDENCE; TEMPERATURE EFFECTS; NASTRAN
Downloads: 87
[texts]Study on networking issues of medium earth orbit satellite communications systems - Araki, Noriyuki
Two networking issues of communications systems with medium earth orbit (MEO) satellites, namely network architectures and location determination and registration methods for hand-held terminals, are investigated in this paper. For network architecture, five candidate architectures are considered and evaluated in terms of signaling traffic. For location determination and registration, two methods are discussed and evaluated.
Keywords: ATMOSPHERIC SOUNDING; CARBON DIOXIDE LASERS; CONTROL EQUIPMENT; DESIGN ANALYSIS; FAULT TOLERANCE; MIRRORS; RAY TRACING; DOPPLER RADAR; LASER APPLICATIONS; OPTICAL HETERODYNING; OPTICAL RADAR; SOLID STATE LASERS; WIND MEASUREMENT; ABERRATION; BORESIGHT ERROR
Downloads: 82
[texts]Indelible Ink Notes - Brian Mearns
Some scanned copies of (mostly handwritten) notes and descriptions on assorted topics. Note that these are written by an amateur, I am no expert. Topics include basics (very basics) of color vision; RGB, HSL, HSV, and YCC color encodings; light reflection specifically in regards to ray tracing; additional detail on trichromatic color vision and additive- and subtractive- primary color blending; a proof of Euler's identity; a description of Complex Differentiability with regard to Cauchy-Riemann ...
Keywords: indelible ink; trichromatic; light; color; color vision; reflection; ray tracing; crc; cyclic redundancy check; checksum; fast inverse square root; fast inverse squareroot; fast inverse sqrt; fast inv sqrt; 0x5f3759df; 5f3759df; 0x5F3759DF; 5F3759DF; fletcher
Downloads: 126
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